Screw Oil Press Structure Screw oil press is a popular type of oil press machine, mainly composed of feeder, gearbox, pressing chamber and oil receiver. Some screw oil press machines are equipped with electric motors as required. Pressing chamber is the key part which contains a pressing cage and a screw shaft rotating in the cage. An electric cabinet is also necessary to control the whole working procedure. Welcome to send inquiry to amisyoilpress@hotmail.com